As you hv mentioned that you have noticed bleeding after passing stools, it would be probably due to piles/ haemorrhoids.
Next Steps
1. Don't Leave it untreated.Get it diagnosed from a doctor.
2. Avoid spicy and junk food. Eat fresh Fruits and Vegetables from fibres.
3. Avoid constipation. Take some laxative if you have difficulty in passing stools.
4.Take buttermilk everyday.
Health Tips
1. Sit in warm water tub for 10 minutes.
2. Apply Kailash jeevan oint at the anus and insert inside with a finger.